What do you mean by cherry blossoms all over the sky?

When cherry blossoms are in full bloom in spring, the beautiful scene of cherry blossoms under blue sky and white clouds. Cherry blossom sky is a scenery description word, which means the beautiful scene under the blue sky and white clouds when cherry blossoms are in full bloom in spring. Cherry blossoms are a poetic and aesthetic expression, which is often used to describe beautiful things and scenes.